Haematological and biochemical parameters during the laying period in common pheasant hens housed in enhanced cages.

The development of selected haematological and biochemical parameters during the laying period was monitored in common pheasant hens housed in an enhanced cage system. The cages were enhanced by the addition of two perches and a shelter formed by strips of cloth hanging in the corner of the cage. The results showed significant changes in the haematological and biochemical parameters monitored during egg laying.

The influence of crate height on selected biochemical indices in captive-reared mallards.

The aim of this study was to investigate the effects of crate type (particularly its height) on selected biochemical indices in captive-reared mallards (Anas platyrhynchos). The physiological changes in response to 2-h crating in crates of either 20 cm or 26 cm height were monitored in 6-week-old mallards. Plasma corticosterone concentrations showed an increase (P = 0.

The effects of subchronic exposure to metribuzin on Danio rerio.

The aim of this study was to assess the impact of metribuzin in surface waters on fish under experimental conditions. The effects of subchronic exposure to metribuzin on fish growth and the development of histopathological changes in selected organs (gill, kidney, liver) and on activity of some biochemical markers (CYP450, EROD) in Danio rerio were investigated during a 28-day toxicity test. Juvenile growth tests were performed on D.

Effects of subchronic exposure to simazine on zebrafish (Danio rerio).

Objectives: Simazine is a triazine herbicide which has been used for a long period in agriculture and in the aquatic environment for control of weeds and algae. The aim of this study was to investigate the effects of subchronic exposure to simazine on growth and the development of histopathological changes in selected organs (gills, kidney, liver) in Danio rerio.

Methods: Juvenile growth tests were performed on D.

Comparison of acute toxicity of ketoprofen to juvenile and embryonic stages of Danio rerio.

Objectives: Ketoprofen is a common human medicine from a class of non-steroidal anti-inflammatory drugs (NSAIDs), which is provably detected in surface waters in concentrations ordinarily in μg.L-1. The aim of this study was to compare the acute toxicity of ketoprofen to embryonic and juvenile stages of aquarium fish - zebrafish (Danio rerio).

The effects of chronic intermittent noise exposure on broiler chicken performance.

Effects of different noise levels (70 or 80 dB) that broilers were exposed to during the entire fattening period and also the effect of the timing of the first exposure to intermittent noise in the course of fattening (day 1 vs. day 7) were monitored. After 7 days of exposure to intermittent noise, experimental chickens already showed a significant decrease in live body weight in comparison with the control group.

Responses of peripheral blood leukocytes to chronic intermittent noise exposure in broilers.

The purpose of the study was to specify full leukocytic responses in broilers to chronic intermittent noise exposure at two different levels (70 and 80 dB) and to assess the effect of the timing of the beginning of exposure to intermittent noise (from day 1 or day 7 of fattening). Noise treatment of 80 dB resulted in a significant (P < 0.05) elevation of heterophil to lymphocyte ratio (HLR) indicating a stress response of the broilers to the noise stimulus at the level of 80 dB in the course of fattening, in contrast to the 70 dB noise that did not cause any significant changes in HLR when compared to the control without noise treatment.

Comparison of the sensitivity of different fish species to medical substances.

Objectives: Formaldehyde, sodium chloride and potassium permanganate belong to the commonly used substances for fish treatment. The aim is to define and compare their acute toxicity and therapeutic index between two fish species - Danio rerio and Poecilia reticulata.

Design: To determine acute toxicity of these compounds, the semistatic method was implemented in compliance with the OECD No.

Terbutryn toxicity to Danio rerio: effects of subchronic exposure on fish growth.

Objectives: The aim of this study was to investigate effects of subchronic exposure to sublethal levels of terbutryn on growth and on histopathological changes in Danio rerio.

Design: The acute toxicity tests were performed on the juvenile stage of Danio rerio according to OECD No. 203 Fish, Acute Toxicity Test.

Comparison of acute toxicity of 2-phenoxyethanol and clove oil to juvenile and embryonic stages of Danio rerio.

Objectives: Anaesthetics are used in aquaculture to prevent stress and mechanical damage to fish during handling or the treatment of fish in breeding, blood sampling and other veterinary interventions. Clove oil and 2-phenoxyethanol are used in the Czech Republic in a water bath for the short-term immobilization of the fish.

Design: Acute toxicity tests were performed on aquarium fish Danio rerio, which is considered to be one of the model organisms most commonly used in toxicity testing.

Comparison of the sensitivity of Danio rerio and Poecilia reticulata to silver nitrate in short-term tests.

The aim of this study is to assess the acute toxicity of silver nitrate in adult zebra fish and adult guppies and to compare the sensitivity of these species to this compound. Silver is a naturally occurring element in our environment and it combines with other elements such as sulfide, chloride, and nitrate. Silver, in the form of silver nitrate, is one of the most toxic metals affecting freshwater fish.

Effects of different crating periods on selected biochemical indices in broiler chickens.

Effects of different crating periods on selected biochemical indices were monitored in a group of unsexed ROSS 308 broiler chickens aged 42 days. 120 randomly selected chickens were weighted and placed in 15 heavy duty plastic crates with reduction in floor space approx. 160 cm2/kg of body weight of broilers (average body weight was 2.

Variation in the mortality rate of turkeys during transport to the slaughterhouse with travel distance and month.

Failure to comply with animal welfare requirements during the transport of turkeys to the slaughterhouse increases stress in animals, which is manifested by increased mortality rate during transport. The numbers of turkeys that died during transport or soon after arrival may serve as an important parameter to indicate the level of animal welfare during transport of turkeys. The number of turkeys that died during transport to slaughterhouses in the Czech Republic in the period from 1997 to 2004 was investigated.

Effects of reduction in floor space during crating on haematological indices in broilers.

In the perspective of animal protection and welfare, the most common and potentially the most frightening events encountered by the domestic fowl are procedures connected with transport. This study provides an evidence that reduction in floor space during crating, which is approximately 10% above requirements given to EEC Directives (accompanied with mixed social and heat stress due to high animal density), induces markedly elevated stress in broilers which is manifested by changes in haematological indices. The experiment was performed on ROSS 308 broilers (total number 70, mean body weight 3.